Reversing-gear for steam-engines.



N0- 799,712. v PATENTED SEPT. 19, 1905. k

B. H. BROWN.

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APPLICATION FILED MAY 13, 1905.

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6 nu/GM LZL :AL [/5612 No. 799,712. PATENTED SEPT. 19, 1905.

B. H. BROWN. REVERSING GEAR- FOR STEAM ENGINES.

APPLICATION FILED MAY 13, 1905.

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i: By fi UNITED STATES PATENT OFFICE.

REVERSIIiG-GEAR FOR STEAM-ENGlNESr Specification of Letters Patent.

Patented Sept. 19, 1905.

Application filed May 13,1905. $erial No. 260,326.

T 0 all whom, it may concern:

Be it known that I, BENJAMIN HENRY BROWN, a subject of His Majesty the King of Great Britain and Ireland, residing at Range Farm, New Plymouth, in the Provincial District of Taranaki, in the Colony of New Zealand, (care of J. Brown,) have invented certain new and useful Improvements in Reversing-Gear for Steam-Engines and the Like, of which the following is a specification.

This invention relates to gear used for reversing steam-engines and the like. and according hereto the valve-rod is provided with a slotted bracket within which the crank-pin of a crank-shaft and its brasses are fitted. The crank-pin carries upon its free end a block, and to the middle part of the crank-shaft a toothed reversing-wheel is fixed. The block upon the end of the crank-pin passes into a gap provided in a mutilated disk, the said disk being mounted upon a short crank-shaft, which is revolved by any convenient reciprocating part of the engine. A reversing-lever is fixed upon a reversing-shaft upon which an arm is fixed having a rack adapted to gear with the toothed reversing-wheel. To reverse the engine, the lever is operated to make the rack gear with and revolve the reversing-wheel which carries the crank-pins through a portion of a circle, the traverse of the crank-pins being limited by the gap in the mutilated disk. The crank-pin and reversing-wheel are revolved by the crank-shaft and the mutilated disk, thereby reciprocating the valve-rod in ,the bracket of which the crank-pin and its brasses slide.

The drawings illustrate the invention applied to a two-cylinder engine.

Figure 1 is a front elevation, partly in section, and Fig. 2 a side elevation, partly in section, of a vertical double-cylinder engine fitted with my invention. Fig. 3 is a front elevation, and Fig. 4 an end elevation, of a mutilated disk and its shaft and crank. Fig. 5 is a side view of a reversing-wheel, and Fig. 6 a section on line A A ofFig. 5. Fig. 7 is an end view, and Fig. 8 a side view, of a rack and its arm. Fig. 9 is an end view of a block, and Fig. 10 an elevation of a crank-shaft fitted with a reversing-wheel and blocks upon its crank-pins. Fig. 11 is aside view of a valverod slotted bracket. Fig. 12 is an end view of the same. Fig. 13 is an end view of the bracket carrying the crank-shaft and its connections.

Associated with each cylinder of the engine is a valve-rod 1, which has a bracket 2, provided with a slot 3, within which a crank-pin 4L and its brasses 5 are adapted to slide. The crank-pin is provided with a block 6, shaped as shown in Figs. 9 and 10 and adapted to enter a gap 7, formed in the mutilated disk 8. The crank-shaft 9 is carried in bearings 10 and 11 and has secured to it near its middle a toothed reversing-wheel 12. The mutilated disk 8 is mounted upon or integral with a shaft 13, carried in a bearing 14:. At the other end of the shaft 13 an arm 15, carrying a crank-pin 16, is secured. I

- In the arrangement shown on the drawings of a two-cylinder engine two mutilated disks 8 are shown arranged with their crank-pins 16 at right angles to each other, and these crank-pins are coupled to pump-rods 17 by connecting-rods 18. The connecting-rods are reciprocated by the pump-rods, and the shafts 13, with their mutilated disks 8 and blocks 6 and crank-pins 4:, are revolved, and thereby operate the valve-rods 1. 19 is mounted in bearings 20 and 21 and is fitted with a reversing-lever 22. An arm 23-, fixed upon the end of the shaft, is provided with a rack 24, adapted to gear with the toothed reversing-wheel 12.

To reverse the engine and cause it to oper-v ate in a direction opposite to that indicated in the drawings, the reversing-lever 22 is operated to bring the rack24i into gear with the toothed reversing-wheel 12 and to revolve the reversing-wheel until the blocks 6 rest upon the opposite side of the gaps 7 of the mutilated disks 8, the number ofteeth in the rack being just sufficient to carry the blocks 6 over, as described.

What I claim, and desire to secure by Letters Patent of the United States. is

1. For the purpose indicated in combination, a valve-rod, a slotted bracketintegral with the valve-rod, a crank-shaft, a crank-pin on the crank-shaft fitted with a block, a disk havinga gap adapted to receive the said block, a crank-shaft carrying the said disk, and means for revolving the crank-shaft, substantially as set forth.

2. For the purpose indicated in combination, a valve-rod, a slotted bracket integral with the valve-rod, a double crank-shaft, crank-pins on the crank-shaft, blocks secured to the ends of the crank-pins, disks provided with a gap adapted to receive said blocks, crank-shafts upon which the disks are mounted, connecting-rods coupled at one end to the A reversing-shaft said crank-pins, and at the other end to pumplevers of the engine, substantially as set forth.

3. Forthe purpose indicated in combination, a valve-rod, a slotted bracket integral with the valverod, a double crank-shaft, crank-pins on the crank-shaft, blocks secured to the ends of the crank-pins, disks provided with a gap adapted to receive said blocks, crank-shafts upon which the disks are mounted, connecting-rods coupled at one end to the said crank-pins, and at the other end to pumplevers of the engine, a toothed reversing- Wheel secured to the shaft and means for reversing the said wheel, substantially as set forth.

4:. For the purpose indicated in combination, a valve-rod, a slotted bracket integral with the valve-rod, a double crank Shaft, crank-pins on the crank-shaft, blocks secured to the ends of the crank-pins, disks provided with a gap adapted to receive said blocks, crank-shafts upon which the disks are mounted, connecting-rods coupled at one end to the said crank-pins, and at the other end to pumplevers of the engine, a toothed reversingwheel secured to the shaft, means for reversing the said wheel, a reversing-shaft, a reversing-lever fixed to the reversing-shaft, an arm fixed to the reversing-shaft, a rack upon the end of the arm adapted to engage with the toothed reversing-wheel, substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two witnesses.

BENJAMIN HENRY BROWN.

Witnesses:

EDWARD C. JoNEs, M. J ONES. 

